Director — Richard (Rick) E. Muncrief: Election of a new director to the Board of Directors.

Results of Operations and Financial Condition OGE Energy Corp. ("OGE Energy") is the parent company of Oklahoma Gas and Electric Company ("OG&E"), a regulated electric company with approximately 917,000 customers in Oklahoma and western Arkansas. On July 29, 2026, OGE Energy issued a press release announcing its consolidated financial results for the quarter ended June 30, 2026. A copy of such press release is furnished as Exhibit 99.01 and incorporated by reference herein.

Entry into a Material Definitive Agreement

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant On June 12, 2026 (the "Closing Date"), OGE Energy Corp. ("OGE Energy") and its subsidiary, Oklahoma Gas and Electric Company ("OG&E"), each entered into a second amended and restated credit agreement providing for an unsecured five-year revolving credit facility (each, a "New Facility" and collectively, the "New Facilities"). Each of the New Facilities is scheduled to terminate on…

Other Events OGE Energy's Board of Directors declared a third quarter dividend of $0.425 per common share of stock, to be paid July 31, 2026, to shareholders of record July 6, 2026. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. OGE ENERGY CORP. (Registrant) By: /s/ Sarah R. Stafford Sarah R. Stafford Controller and Chief Accounting Officer May 14…

Results of Operations and Financial Condition OGE Energy Corp. ("OGE Energy") is the parent company of Oklahoma Gas and Electric Company ("OG&E"), a regulated electric company with approximately 915,000 customers in Oklahoma and western Arkansas. On April 29, 2026, OGE Energy issued a press release announcing its consolidated financial results for the quarter ended March 31, 2026. A copy of such press release is furnished as Exhibit 99.01 and incorporated by reference herein.

Director — Luther C. Kissam, IV: Mr. Kissam is resigning from the Board due to accepting a new position as CEO of another company.

Other Events OGE Energy Corp. ("OGE Energy") is the parent company of Oklahoma Gas and Electric Company ("OG&E"), a regulated electric company with approximately 913,000 customers in Oklahoma and western Arkansas. On April 1, 2026, OG&E, an Oklahoma corporation, completed the issuance of $350.0 million in aggregate principal amount of its 5.90% Senior Notes, Series due April 1, 2056 (the "OG&E Senior Notes"). The offering of the OG&E Senior Notes was registered under the Securities Act of 193…

Director — Judy R. McReynolds: Ms. McReynolds will not stand for re-election and will retire from the Board at the upcoming annual shareholder meeting.

Results of Operations and Financial Condition OGE Energy Corp. ("OGE Energy") is the parent company of Oklahoma Gas and Electric Company ("OG&E"), a regulated electric company with approximately 913,000 customers in Oklahoma and western Arkansas. On February 18, 2026, OGE Energy issued a press release announcing its consolidated financial results for the year ended December 31, 2025 and Board approval of a second quarter dividend. A copy of such press release is furnished as Exhibit 99.01 and…

Vice President — Donnie O. Jones: The filing discloses a planned retirement of a Vice President at year-end 2026, which is an orderly succession rather than a sudden loss of a senior executive.

Other Events On November 20, 2025, the Company entered into an Underwriting Agreement (the “Underwriting Agreement”) with Morgan Stanley & Co. LLC and J.P. Morgan Securities LLC, as representatives (the “Representatives”) of the several underwriters named therein (the “Underwriters”), Morgan Stanley & Co. LLC and J.P. Morgan Securities LLC, acting in their capacity as forward sellers (in such capacity, the “Forward Sellers”), and Morgan Stanley & Co. LLC and JPMorgan Chase Bank, National Asso…

Regulation FD Disclosure On November 20, 2025, OGE Energy Corp. (NYSE: OGE) (the “Company”) issued a press release announcing the Offering (as defined below) and issued a press release announcing that it had priced the Offering. Copies of these press releases are furnished as Exhibits 99.01 and 99.02 hereto and are incorporated herein by reference. We anticipate that the net proceeds of the Offering, together with proceeds from our automatic dividend reinvestment and stock repurchase plan, wi…

Entry into a Material Definitive Agreement The disclosure regarding the Forward Sale Agreements (as defined below) under

Results of Operations and Financial Condition OGE Energy Corp. ("OGE Energy") is the parent company of Oklahoma Gas and Electric Company ("OG&E"), a regulated electric company with approximately 910,000 customers in Oklahoma and western Arkansas. On October 29, 2025, OGE Energy issued a press release announcing its consolidated financial results for the quarter ended September 30, 2025. A copy of such press release is furnished as Exhibit 99.01 and incorporated by reference herein.

Results of Operations and Financial Condition OGE Energy Corp. ("OGE Energy") is the parent company of Oklahoma Gas and Electric Company ("OG&E"), a regulated electric company with approximately 909,000 customers in Oklahoma and western Arkansas. On July 30, 2025, OGE Energy issued a press release announcing its consolidated financial results for the quarter ended June 30, 2025. A copy of such press release is furnished as Exhibit 99.01 and incorporated by reference herein.

Other Events OGE Energy's Board of Directors declared a third quarter dividend of $0.42125 per common share of stock, to be paid July 25, 2025, to shareholders of record July 7, 2025. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. OGE ENERGY CORP. (Registrant) By: /s/ Sarah R. Stafford Sarah R. Stafford Controller and Chief Accounting Officer May…

Results of Operations and Financial Condition OGE Energy Corp. ("OGE Energy") is the parent company of Oklahoma Gas and Electric Company ("OG&E"), a regulated electric company with approximately 909,000 customers in Oklahoma and western Arkansas. On April 30, 2025, OGE Energy issued a press release announcing its consolidated financial results for the quarter ended March 31, 2025. A copy of such press release is furnished as Exhibit 99.01 and incorporated by reference herein.

Other Events OGE Energy Corp. ("OGE Energy") is the parent company of Oklahoma Gas and Electric Company ("OG&E"), a regulated electric company with approximately 907,000 customers in Oklahoma and western Arkansas. On April 1, 2025, OG&E, an Oklahoma corporation, completed the issuance of $350.0 million in aggregate principal amount of its 5.80% Senior Notes, Series due April 1, 2055 (the "OG&E Senior Notes"). The offering of the OG&E Senior Notes was registered under the Securities Act of 193…

Results of Operations and Financial Condition OGE Energy Corp. ("OGE Energy") is the parent company of Oklahoma Gas and Electric Company ("OG&E"), a regulated electric company with approximately 907,000 customers in Oklahoma and western Arkansas. On February 19, 2025, OGE Energy issued a press release announcing its consolidated financial results for the year ended December 31, 2024 and Board approval of a second quarter dividend. A copy of such press release is furnished as Exhibit 99.01 and…

Entry into a Material Definitive Agreement OGE Energy Corp. ("OGE Energy") is the parent company of Oklahoma Gas and Electric Company ("OG&E"), a regulated electric company with approximately 905,000 customers in Oklahoma and western Arkansas. As previously disclosed, in December 2021, OGE Energy and OG&E each entered into $550.0 million unsecured five-year revolving credit facilities, and in December 2022, those credit facilities were amended to extend their term for one year, until December…

CFO — Charles B. Walworth: The filing announces the permanent appointment of an interim CFO who was already serving in the role, representing an internal promotion rather than a departure.

Results of Operations and Financial Condition OGE Energy Corp. ("OGE Energy") is the parent company of Oklahoma Gas and Electric Company ("OG&E"), a regulated electric company with approximately 905,000 customers in Oklahoma and western Arkansas. On November 5, 2024, OGE Energy issued a press release announcing its consolidated financial results for the quarter ended September 30, 2024. A copy of such press release is furnished as Exhibit 99.01 and incorporated by reference herein.

CFO — W. Bryan Buckler: The CFO resigned to join another company, resulting in the loss of a sitting senior executive, though the transition is orderly with an interim appointment and no reported disagreements.

Other Events OGE Energy Corp. ("OGE Energy") is the parent company of Oklahoma Gas and Electric Company ("OG&E"), a regulated electric company with approximately 902,000 customers in Oklahoma and western Arkansas. On August 15, 2024, OG&E, an Oklahoma corporation, completed the issuance of $350.0 million in aggregate principal amount of its 5.60% Senior Notes, Series due April 1, 2053 (the "OG&E Senior Notes"). The aggregate principal amount of the 5.60% Senior Notes, Series due April 1, 2053…